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Scandinavian Journal of Gastroenterology Volume 29, 1994 - Issue 9
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Original Article

Comparison of Sequential and Fixed-Sample Designs in a Controlled Clinical Trial with Laparoscopic versus Conventional Cholecystectomy

P. Kjærsgaard Medstat Research, Centre for Design, Administration and Statistical Analysis in Medical Research, Liliestrøm; Dept. of Surgery, Section of Gastroenterology, Akershus Central Hospital, Lørenskog, Norway
,
O. Reiertsen Medstat Research, Centre for Design, Administration and Statistical Analysis in Medical Research, Liliestrøm; Dept. of Surgery, Section of Gastroenterology, Akershus Central Hospital, Lørenskog, Norway
,
E. Trondsen Medstat Research, Centre for Design, Administration and Statistical Analysis in Medical Research, Liliestrøm; Dept. of Surgery, Section of Gastroenterology, Akershus Central Hospital, Lørenskog, Norway
,
A. R. Rosseland Medstat Research, Centre for Design, Administration and Statistical Analysis in Medical Research, Liliestrøm; Dept. of Surgery, Section of Gastroenterology, Akershus Central Hospital, Lørenskog, Norway
&
S. Larsen Medstat Research, Centre for Design, Administration and Statistical Analysis in Medical Research, Liliestrøm; Dept. of Surgery, Section of Gastroenterology, Akershus Central Hospital, Lørenskog, Norway
Pages 854-858 | Received 06 Sep 1993, Accepted 28 Dec 1993, Published online: 08 Jul 2009

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